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Originally Posted by PineMangoes
I am talking about the addition about ammonium to water; by using the Ka value (9.25), i can theoretically calculate the concentration of hydrogen atoms by using a quadratical equation, is this possible? By using this equation i get pH values which are higher instead of lower than 7 which is very disturbing indeed. Any help would be appreciated 
PS: not sure if ammonium can be qualified as a strong acid |
no ammonium is a weak acid. First off, I think that 9.25 is actually the pKa, you'll need to inverse log this value to obtain the ka. The rest is simple
Ka=[NH3+x][H30+ +x]/[initial ammonium-x]
=[x][x]/[initial ammonium concentration-x], solve for x, which is the acid concentration (hydronium)
how would you obtain the pH from the hydronium concentration?